"My name is Sam," he told her. "Sam Winchester. I'm part of the welcoming committee. We, you know." He gestured broadly, "welcome new arrivals." She was certainly a different sort of arrival. He was actually glad he was the one there to meet her as opposed to say, Alex. He might be used to the weirdness of the portal and the new arrivals, but Sam had a feeling he'd freak out at a werewolf coming through in wolf form.
And then standing there naked. Not that Alex would be impressed by the female form. But still. "The real question is, who are you?"